Applied to the connection parts of electronic products, such as mobile phone cables, LCD module shielding films and covering films

FPC flexible board is mainly used in the connection parts of electronic products, such as mobile phone cables, LCD modules, etc. Compared with rigid boards, it has a smaller volume and lighter weight, and can achieve advantages such as bending and bending, three-dimensional assembly, etc. Generally, most soft boards require components to be attached.

Is the shielding film and covering film in FPC the same?

FPC, as a connecting wire in electronic devices, mainly plays a role in conducting current and transmitting signals. When the signal transmission line is distributed within the outermost layer of the FPC, in order to avoid signal distortion caused by electromagnetic interference during the signal transmission process, the FPC will be laminated with another layer after laminating the cover filmElectromagnetic shielding filmAs a conductive layer, it plays a role in shielding external electromagnetic interference.

Electromagnetic shielding film is made of mixed composite metals as shielding materials, which have excellent OSP performance and corrosion solvent resistance. In terms of shielding and bending characteristics, it is superior to similar products in the market.Electromagnetic wave shielding filmSuitable for FPC flexible printed circuits. Has high shielding, bending, and heat resistance. Suitable for electronic touch screen connection wires and circuits, with strong protection against electromagnetic wave interference!

The performance of FPC flexible circuit boards needs to be verified through testing, and the efficiency of testing can be improved by using bullet micro needle modules,. In high current transmission, the bullet micro needle module can carry up to 50A of current, and the minimum response value in the small pitch field can reach 0.15mm. The connection is stable and reliable, and the average service life is up to 200000 times, with extremely high adaptability.

Shielding filmIt is electromagnetic film, which is black in color and mainly used to shield external signal interference, etc;

A cover film is a film that covers and is pressed onto the surface of a substrate. It is usually polyimide resin, also known as PI, used for solder mask and has little effect on signal shielding. Electromagnetic film is usually applied on top of the covering film, and the price of electromagnetic film is much higher than that of the covering film.

FPC cover film, also known as CVL in the industry, has a main function similar to PCB green paint: 1) to protect copper foil from exposure to air and prevent oxidation of copper foil; 2) Cover for subsequent surface treatment. Cover areas that do not require gold plating with CVL. 3) In the subsequent SMT, solder mask function.